(CNN) - Don't expect to receive any regular mail this Wednesday.
The U.S. Postal Service is suspending regular mail deliveries that day, to honor President George H.W. Bush.
USPS retail services and offices will also be closed, but the service will still do limited package deliveries to prevent interruption in its holiday season operations.
Wednesday is a National Day of mourning for the 41st president.
Financial markets and the Supreme Court will also take a day off to honor him.